Merge branch 'develop' into ci_adjust_2022

Resolved Conflicts:
	.drone.star
	.github/workflows/ci.yml

Moved more CI from Github to drone.

.github/workflows/ci.yml

@@ -147,7 +147,7 @@ jobs:
       fail-fast: false
       matrix:
         compiler: [ g++-9, g++-11, clang++-10 ]
-        standard: [ c++14, c++17, c++2a ]
+        standard: [ c++11, c++14, c++17, c++2a ]
     steps:
       - uses: actions/checkout@v2
         with:
@@ -204,77 +204,13 @@ jobs:
       - name: Test
         run: ../../../b2 toolset=$TOOLSET no_eh_tests exception-handling=off rtti=off define=CI_SUPPRESS_KNOWN_ISSUES define=SLOW_COMPILER
         working-directory: ../boost-root/libs/math/test
-  ubuntu-bionic:
-    runs-on: ubuntu-18.04
-    strategy:
-      fail-fast: false
-      matrix:
-        compiler: [ clang++-6.0, g++-7, g++-8, clang++-7, clang++-8 ]
-        standard: [ c++14, c++17 ]
-        suite: [ float128_tests, special_fun, distribution_tests, misc, quadrature, mp, interpolators, autodiff, ../example//examples, ../tools ]
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: '0'
-      - uses: mstachniuk/ci-skip@v1
-        with:
-          commit-filter: '[skip ci];[ci skip];[CI SKIP];[SKIP CI];***CI SKIP***;***SKIP CI***;[windows];[Windows];[WINDOWS];[apple];[Apple];[APPLE];[standalone];[STANDALONE];[cygwin];[CYGWIN]'
-          commit-filter-separator: ';'
-          fail-fast: true
-      - name: Set TOOLSET
-        run: echo ${{ matrix.compiler }} | awk '/^g/ { print "TOOLSET=gcc" } /^clang/ { print "TOOLSET=clang" }' >> $GITHUB_ENV
-      - name: Add repository
-        continue-on-error: true
-        id: addrepo
-        run: sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
-      - name: Retry Add Repo
-        continue-on-error: true
-        id: retry1
-        if: steps.addrepo.outcome=='failure'
-        run: sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
-      - name: Retry Add Repo 2
-        continue-on-error: true
-        id: retry2
-        if: steps.retry1.outcome=='failure'
-        run: sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
-      - name: Install packages
-        run: sudo apt install g++-6 g++-7 g++-8 clang-6.0 clang-7 clang-8 libgmp-dev libmpfr-dev libfftw3-dev
-      - name: Checkout main boost
-        run: git clone -b develop --depth 1 https://github.com/boostorg/boost.git ../boost-root
-      - name: Update tools/boostdep
-        run: git submodule update --init tools/boostdep
-        working-directory: ../boost-root
-      - name: Copy files
-        run: cp -r $GITHUB_WORKSPACE/* libs/math
-        working-directory: ../boost-root
-      - name: Install deps
-        run: python tools/boostdep/depinst/depinst.py math
-        working-directory: ../boost-root
-      - name: Bootstrap
-        run: ./bootstrap.sh
-        working-directory: ../boost-root
-      - name: Generate headers
-        run: ./b2 headers
-        working-directory: ../boost-root
-      - name: Generate user config
-        run: 'echo "using $TOOLSET : : ${{ matrix.compiler }} : <cxxflags>-std=${{ matrix.standard }} ;" > ~/user-config.jam'
-        working-directory: ../boost-root
-      - name: Config info install
-        run: ../../../b2 config_info_travis_install toolset=$TOOLSET
-        working-directory: ../boost-root/libs/config/test
-      - name: Config info
-        run: ./config_info_travis
-        working-directory: ../boost-root/libs/config/test
-      - name: Test
-        run: ../../../b2 toolset=$TOOLSET ${{ matrix.suite }} define=CI_SUPPRESS_KNOWN_ISSUES define=SLOW_COMPILER
-        working-directory: ../boost-root/libs/math/test
   macos:
     runs-on: macos-latest
     strategy:
       fail-fast: false
       matrix:
         toolset: [ clang ]
-        standard: [ 14, 17, 20 ]
+        standard: [ 11, 14, 17, 20 ]
         suite: [ float128_tests, special_fun, distribution_tests, misc, quadrature, mp, interpolators, autodiff, ../example//examples, ../tools ]
     steps:
       - uses: actions/checkout@v2
@@ -412,7 +348,7 @@ jobs:
       fail-fast: false
       matrix:
         compiler: [ g++-11 ]
-        standard: [ c++14, c++17 ]
+        standard: [ c++17 ]
         suite: [ float128_tests, special_fun, distribution_tests, misc, quadrature, mp, interpolators, autodiff, ../example//examples, ../tools ]
     env:
       TOOLSET: gcc
@@ -542,7 +478,7 @@ jobs:
       fail-fast: false
       matrix:
         compiler: [ g++-10 ]
-        standard: [ c++14, c++17, c++2a ]
+        standard: [ c++14, c++17, c++20 ]
         suite: [ float128_tests, special_fun, distribution_tests, misc, quadrature, interpolators, autodiff, ../example//examples, ../tools ]
     steps:
       - uses: actions/checkout@v2